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Hydrogen sulfide scavenger for use in hydrocarbons

a technology of hydrocarbons and scavengers, applied in the field of additives, can solve the problems of toxic and corrosive effects of hydrogen sulfid

Active Publication Date: 2012-12-27
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrogen sulfide is both toxic and corrosive.

Method used

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  • Hydrogen sulfide scavenger for use in hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026]Condensate, a liquid under ambient conditions which is a mixture of low molecular weight alkanes, is sparged with nitrogen having a hydrogen sulfide concentration of 1% for 1 hour.

[0027]The concentration of the hydrogen sulfide in the condensate prior to treatment (blank) is determined to be 19.9 ppm. The condensate is then tested by introducing a hydrogen sulfide scavenger prepared by reacting glyoxal and DETA at a molar ratio of 1:1 (which is an equivalent ratio of 1:2). The treated condensate and a blank were shaken using an orbital shaker at 400 rpm at ambient conditions for 4 hours. The blank was retested and had a hydrogens sulfide concentration of 10.5 ppm. The treated sample showed no measurable hydrogen sulfide (<0.5 ppm).

example 2

[0028]Example 1 was repeated substantially identically except that the initial concentration of hydrogen sulfide was 30.8 ppm and the hydrogen sulfide scavenger was introduced at a concentration of 300 ppm. After treatment, the blank has a hydrogen sulfide concentration of 13.1 ppm. The treated sample showed no measurable hydrogen sulfide (<0.5 ppm).

example 3

[0029]The hydrogen scavenger of Example 1 is used to immerse carbon steel corrosion coupons. The immersed coupons were held at about 40° C. for 14 days. The corrosion rate was determined to be about 19.19 mpy.

Discussion of Examples

[0030]The examples show that the claimed hydrogen sulfide scavengers are effective at reducing the concentration of hydrogen sulfide in hydrocarbons. They also show that the claimed hydrogen sulfide scavengers have a very low corrosion rate.

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Abstract

An effective hydrogen sulfide scavenger that produces little corrosion may be prepared by reacting glyoxal with a compound having at least two primary or secondary amine groups. The subject hydrogen sulfide scavengers may be used with both the production of crude oil and natural gas, and the refining of same.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from the U.S. Provisional Patent Application serial number 61 / 499,513 which was filed on June 21, 2011.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to additives useful for reducing the concentration of hydrogen sulfide in hydrocarbons. The invention particularly relates to additives that are a system of components and their use in hydrocarbons to scavenge hydrogen sulfide.[0004]2. Background of the Art[0005]Hydrocarbons, such as crude oil, may contain acids in several forms. These acids may be mineral acids such as hydrochloric and phosphoric acids. A common inorganic acid found in hydrocarbons is hydrogen sulfide and various oxidized forms of hydrogen sulfide such as sulfuric acid.[0006]Hydrogen sulfide is both toxic and corrosive. Neither of these properties is usually desirable in hydrocarbons.[0007]Hydrogen sulfide may be present when crude oil is produced from ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08L61/20C10C3/02C10G29/20C08G12/06E21B43/00C08K5/09C08K5/13C08K5/10C08G12/26C10L1/00C08K5/06
CPCC10G29/20C08G12/06C09K2208/20C10G2300/1033C10G2300/207C10G2300/1025
Inventor STARK, JOSEPH L.STEELE, ROBERT A.BABIC-SAMARDZIJA, KSENIJASCHIELD, JOHN A.CAPPEL, WELDON J.BARNES, MATTHEW T.
Owner BAKER HUGHES INC
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